Improvement in chill for casting car-wheels



u it fitatra eeaae game; eff} Letters Patent No. 85,046, dated December 15, 1868.

IMPROVEMENT INCHILL PQR CASTING- CAR-WEIEELS,

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern:

Be it known that I, WIL IAM WlLMINGTON, of

Toledo, in-the county of Lucas, and State of Ohio, have invented a new and useful Improvement in the Annular Metallic Portion or-.Ohill which Forms the Periphery of a Gar-Wheel Mould; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, which form a portion of this specificatiom It is well known to all manufacturers of cast-iron car-wheels, that many wheels'have to becondemned in consequence of the occurrence of ugly fractures at the angle or curve between the inner. face of the flange and the periphery or tread of the said imperfect wheels;

the said fractures being caused by the sudden chilling and contraction of the melted 'metal when it comes in contact with the inner periphery and theouter face of the annular metallic chill whichforms the periphery of 'the car-wheel mould.-

I have remedied this defect by an improvement in the said metallic portion of a car-wheel mould, myirnprove ment consisting in forming the chill with a groove, a, in the angle or curve thereof between the inner pe riphery and the outer horizontal face of said chill, as

shown in the accompanyingdrawings, and then filling said groove with clay orsand preparatory to the casting of a car-wheel. A sufficient portion of the horizontal face ofthe'chill is left vunprotected by the sandfilled, groove to chill the portion of the inner face of the flan ge of the car-wheel which is to comein con-- tact with the inner sides of the railroad-rail's. f In the accompanying drawings,

Figure 2 is'a top view of my improvedmetallicportion of a car-wheel mould, and

Figure 1, a section in theline a: at of fig'.'2.'

What I claim as my invention, and desire to secure wri es I I 

